mrcem sba MCQ (SBA): COPD exacerbation

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A 76-year-old with known COPD (FEV₁ 48% predicted) presents with increased dyspnoea, purulent sputum, and wheeze. SpO₂ 89% on air. Which oxygen target saturation is appropriate during controlled oxygen therapy?

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mrcem sba MCQ: COPD exacerbation — Answer & Explanation | iatroX